Smart mailbox "Today" is lacking some mail
My "today" mailbox (using Ventura) does not show a mail I received on my mac account an hour ago. The mail does appear in my inbox. It also appears in the "Today" box of an older computer running Catalina, with EXACTLY the same definition of Today (namely "Date received is today"), and exactly the same mail setup. The same problem occurs with "recent" and "Last Month". Earlier messages received on my mac account, as well as earlier and later messages from other accounts do appear.
MacBook Pro (M2 Pro, 2023)